How do I transfer apps and data from a very old iPad which does not run iOS 11?

Hi, and welcome to the Apple Community.

We are all Apple users, like yourself, in this community,

with some of us doing the best we can to help, along with some quite expert.

There is another discussion thread that may be helpful in choosing a method:

https://discussions.apple.com/thread/253391442

Would help to know which iPad model, and iOS is on the very old iPad Pro.

You might want to Identify which iPad Pro model you have:

https://support.apple.com/en-us/HT201471

To check which iOS is installed:

Find the software version on your iPhone, iPad, or iPod

https://support.apple.com/en-us/HT201685

All the best :-)